1ºESO BRITISH: FRONTAL RAIN

1.- CONCEPTS

a.- What is a front?

b.- Which mass of air weighs less: warm air or cold air?

c.- Which mass of air is heavier and more dense: warm air or cold air?

d.- Put in order the following process and copy it in order in your notebook:

• When it cools, water vapour transforms into droplets as it condenses and forms clouds.
• Warm air rises, as it is not very heavy.
• When a cloud contains too much water, it precipitates to the Earth´s surface.
• When it rises, it gets colder and colder.

2.- WARM FRONT

a.- Copy this picture in your notebook.

b.- Put in order the following sentences and copy them below your picture, building a paragraph.

___ The warm air rises slowly, and cools and condenses.

___ A warm front inclines because the cold air mass is heavier and moves under the warm air mass.

___ Long periods of light rain are produced.

3.- COLD FRONT

a.- Copy this picture in your notebook.

b.- Put in order the following sentences and copy them below your picture, building a paragraph.

___ Short periods of heavy rain are produced.

___ This causes warm air to rise quickly.

___ The warm air mass inclines vertically.

___ A cold front is produced when a cold aire mass moves and pushes into a warm air mass.